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用于抗旱性筛选的特征研究中,与地上部相比,根系特别是根系解剖学很少受到重视。Esau(1965)曾注意到,查于土中不定根的生长受到限制,从而使输入作用主要依赖于种子根的导水性。Camecho 等(1974)指出,当大气干旱时,具有较强导水系统的植物其叶片组织免于脱水。这种根和苗高导水性必定是有益的普遍认识,因Passioura(1972)的研究结果而改变,他将小麦播种在蓄水较少的盆钵中,发现当把根系修剪只留种子根时,种子
In characterization studies for drought resistance screening, root systems, especially root anatomy, have received less attention than shoots. Esau (1965) noted that the growth of adventitious roots found in soils is limited so that the input is largely dependent on the water conductivity of the seed roots. Camecho et al. (1974) pointed out that when the atmosphere is dry, the plant tissue with strong water conducting system is free from dehydration of its leaf tissue. This root and shoot height conductivity must be of general benefit, as a result of the study of Passioura (1972) that he sowed the wheat in pots with less water and found that when the roots were trimmed to leave only seed roots ,seed